If she has five to six wet diapers in a day and one or two bowel movements, and if when she goes in for her first well-baby check her weight gain is at the normal rates, everything should be fine.
My little guy is 3 days old today and my pediatrician said 2-3 oz per feeding. I feed on demand so no schedule, I always offer breast or bottle when he wakes up and is moving around and let him eat what he wants. If he over eats he will spit it up which isnt a big deal unless he is projectile vomiting. I'm also breast feeding but my milk has been a little slow coming in so I've been supplementing formula. Good luck!